High severity7.8NVD Advisory· Published Aug 26, 2026· Updated Sep 24, 2026
CVE-2026-58091
CVE-2026-58091
Description
The implementation of this ioctl attempts to acquire locks on all channels in a sync group. If locking a channel would block, it releases the sync group list lock and sleeps. Upon reawakening, it is possible that the sync group structure is freed, but the implementation did not handle this possibility.
On a system with a multiple audio devices, an unprivileged local user can exploit this use-after-free to escalate privileges.
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Affected products
1Patches
Vulnerability mechanics
References
1- security.freebsd.org/advisories/FreeBSD-SA-26:58.sound.ascnvdVendor Advisory
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